What is an Autonomous System (AS)?

An AS is a large network or group of networks that has a unified routing policy. The Internet is essentially a network of connected ASNs.

ASNs are assigned by Regional Internet Registries (RIRs) to large organizations, ISPs, and tech companies that require direct peering on the internet backbone.

Network engineers use it to troubleshoot BGP routing issues, trace internet outages, or map out the infrastructure footprint of major tech corporations.

ASN WHOIS Lookup

Retrieve detailed WHOIS and routing information for an Autonomous System Number (ASN).

ASN Details & Routing Info

What is the ASN WHOIS?

The ASN WHOIS tool queries BGP routing databases to provide detailed information about an Autonomous System Number (ASN), including its owner, country, and associated IP prefixes.

How to use it

Enter an ASN (e.g., AS15169 for Google).
Click "Lookup".
Review the organizational details and routing data.

ASN WHOIS Lookup

ASN Details & Routing Info

What is the ASN WHOIS?

How to use it

Frequently Asked Questions